Effect of Chlorhexidine Application on Microtensile Bond Strength to Dentin

Abstract

©Operative Dentistry, 2008, 33-2, 183-188 SUMMARYThis study evaluated the effect on microtensile bond strength (µTBS) of chlorhexidine application to dentin at different times during an indirect restoration luting procedure. Sixty bovine incisors had their superficial dentin subjected to 0.12% and 2% chlorhexidine solutions for 15 seconds before, during and after 37% phosphoric acid etching, resulting in six groups (n=10): 1) 0.12% chlorhexidine + etching; 2) 2% chlorhexidine + etching; 3) etching + 0.12% chlorhexidine; 4) etching + 2% chlorhexidine; 5) etching with 2% chlorhexidine; 6) etching without chlorhexidine (control). An adhesive system (Adper Single Bond 2) was applied and an indirect resin composite restoration (Filtek Z250) was luted using dual cured resin cement (Rely X ARC). After 24 hours of water storage, the specimens were tested by microtensile bond test (µTBS) at 0.5 mm/minute in a universal testing machine. The data were analyzed by one-way ANOVA (α=0.05), demonstrating no significant differences among the groups.

Influence of Matrix Metalloproteinase Synthetic Inhibitors on Dentin Microtensile Bond Strength of Resin Cements

“…The use of CHX along with total etch adhesive resins does not impair their ability to bond to dentin. 14,16,[27][28][29][30][31] This finding is in agreement with the present study where a bisphenol A-glycidyl methylmethacrylate (Bis-GMA)/hydroxyethyl methacrylate (HEMA) three-step etch and rinse adhesive system was used along with a conventional dual resin cement.…”

Effect of chlorhexidine on the shear bond strength of self-etch adhesives to dentin

“…The results of the present study are consistent with the results of previous studies on total-etch and two-step selfetch adhesives (de Castro et al, 2003;Bocangel et al, 2000;Soares et al, 2008;Perdigao et al, 1994;Erhardt et al, 2008). They showed that chlorhexidine had no negative effects on the bond strength of adhesive systems, which might be attributed to the compatibility of chlorhexidine with the adhesive resins used.…”

“…Interaction between the positive and negative charges produces an affinity in chlorhexidine molecules for bacteria. The interaction between chlorhexidine molecules and bacteria increases the permeability of bacterial cell membranes, resulting in the penetration of destructive agents into the cytoplasm and the ultimate death of the microorganism (Soares et al, 2008).…”

“…Although the hydrophilic nature of dentin has led to the use of hydrophilic and ionic resin compounds in the formulation of total-etch adhesives, this formulation has contributed to lack of durability and stability of resin matrix and its failure through water absorption. In addition, temperature fluctuations, masticatory loads and chemical degradation due to acids and enzymes threaten the durability of the tooth structure-composite resin bond with time (Soares et al, 2008).…”

Tensile bond strength of a lithium-disilicate pressed glass ceramic to dentin of different surface treatments

“…On factors that may affect the chemical interaction between restorative materials and dentin, and perhaps even the sealing and bonding properties of luting agents, they include the ingredients of desensitizers, antibacterial solutions, and hydrogen peroxide. Besides, saliva and blood contamination may also create a thin film on the dentin surface that hinders adhesive penetration into the dentinal tubules 10,13,14) . In the wake of these concerns, the present study evaluated the effects of various dentin surface treatments (desensitizer, disinfectant, saliva, blood, hydrogen peroxide, no treatment [wet dentin]) on the tensile bond strengths of the adhesive-dentin interface and adhesive-ceramic (lithium disilicate glass ceramic) interface.…”